[PHX-Skywarn] NWS - WEATHER EVENT NOTIFICATION

[ldad administrator]

THIS MESSAGE WAS SENT FROM THE NATIONAL WEATHER SERVICE PHOENIX MAIL SERVER

WGUS65 KPSR 072008
FFAPSR
AZZ021>024-026>028-080700-

BULLETIN...IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE PHOENIX AZ
108 PM MST SAT SEP 7 2002

...FLASH FLOOD WATCH FOR PORTIONS OF SOUTHWEST AND SOUTH-CENTRAL
ARIZONA FROM 3 PM UNTIL MIDNIGHT TONIGHT...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A FLASH FLOOD
WATCH FOR MUCH OF SOUTHWEST AND SOUTH CENTRAL ARIZONA. THIS WATCH
REPLACES THE FLASH FLOOD WATCH THAT HAD BEEN IN EFFECT FOR SOUTH
CENTRAL ARIZONA...AND EFFECTIVELY INCREASES THE WATCH AREA TO
INCLUDE A PORTION OF SOUTHWEST ARIZONA WHILE DELAYING THE ONSET OF
THE WATCH OVER SOUTH CENTRAL ARIZONA.

COUNTIES AND PORTIONS OF COUNTIES IN THE WATCH AREA ARE...
MARICOPA...NORTHERN PINAL..SOUTHERN GILA...AND CENTRAL AND EASTERN LA
PAZ AND YUMA. CITIES AND TOWNS IN THE WATCH AREA INCLUDE...THE
GREATER PHOENIX METROPOLITAN AREA...WICKENBURG...QUARTZSITE...
WENDEN...GILA BEND...CASA GRANDE...COOLIDGE...FLORENCE...SUPERIOR...
GLOBE-MIAMI...AND ROOSEVELT.

THE AIRMASS OVER SOUTHWEST AND SOUTH CENTRAL ARIZONA IS VERY
MOIST...WITH SURFACE DEW POINTS IN THE MID 60S AND PRECIPITABLE
WATER...A MEASURE OF THE AMOUNT OF MOISTURE IN THE ATMOSPHERE...IN
EXCESS OF 1.5 INCHES. AN UPPER LEVEL DISTURBANCE IS EXPECTED TO
APPROACH THE WATCH AREA THIS AFTERNOON AND EVENING...RESULTING IN
AN INCREASED CHANCE FOR SHOWERS AND THUNDERSTORM DEVELOPMENT.
INDIVIDUAL STORMS WILL MOVE RAPIDLY TOWARD THE NORTHEAST AT 30 MPH...
WHICH IS UNFAVORABLE FOR FLASH FLOODING...BUT SEVERAL STORMS MAY
TRACK OVER THE SAME LOCATION IN A SHORT AMOUNT OF TIME...AND RAINFALL
RATES WILL BE ON THE HIGH SIDE. THESE FACTORS...COMBINED WITH
THE FACT THAT MUCH OF NORTHWEST AND CENTRAL MARICOPA COUNTY RECEIVED
SIGNIFICANT RAIN SINCE FRIDAY AFTERNOON...COMBINE TO WARRANT
ISSUANCE OF THIS FLASH FLOOD WATCH.

A FLASH FLOOD WATCH MEANS CONDITIONS ARE FAVORABLE FOR THE
DEVELOPMENT OF LOCALLY HEAVY RAIN AND THE POTENTIAL FOR FLASH
FLOODING. RESIDENTS AND MOTORISTS ARE ADVISED TO AVOID FLOOD PRONE
AREAS. MOTORISTS SHOULD NOT ATTEMPT TO CROSS FLOODED ROADWAYS.

LISTEN TO THE LATEST FORECASTS IN THE EVENT ADDITIONAL WEATHER
WARNINGS OR ADVISORIES ARE NEEDED.

DG


NATIONAL WEATHER SERVICE